Description

1,1,1,3,5,5,7,7,7-Nonamethyl-3-(Trimethylsiloxy)Tetrasiloxane is a high-purity, branched organosilicon compound, specifically a functionalized tetrasiloxane, valued for its unique combination of silicone fluid properties and reactive trimethylsiloxy functionality. This chemical serves as a versatile intermediate and additive, offering excellent thermal stability, low surface tension, and compatibility with organic polymers. It is primarily sought by manufacturers in the personal care, coatings, and specialty chemical industries for formulating advanced release agents, lubricants, and surface modifiers.

Application

• Silicone Fluid Intermediate: A key building block for synthesizing more complex silicone copolymers and resins.
• Release Agent Formulation: Used in the production of mold release agents for plastics, rubber, and composite materials.
• Personal Care Additive: Imparts a silky, non-greasy feel and enhances spreadability in cosmetics, hair conditioners, and skin care products.
• Surface Treatment Agent: Modifies surface properties of fillers, pigments, and fibers to improve dispersion and compatibility in polymer matrices.
• Lubricant and Defoamer Component: Acts as a high-performance additive in specialty lubricants and industrial defoamers.
• Adhesion Promoter: Can be utilized to improve the adhesion of coatings and sealants to difficult substrates.

Basic Information

Product Name	1,1,1,3,5,5,7,7,7-Nonamethyl-3-(Trimethylsiloxy)Tetrasiloxane
CAS No.	38146-99-5
Molecular Formula	C12H38O4Si5
Molecular Weight	431.92 g/mol
Synonyms	Nonamethyl-3-(trimethylsiloxy)tetrasiloxane; 3-(Trimethylsiloxy)-1,1,1,3,5,5,7,7,7-nonamethyltetrasiloxane; Tetrasiloxane, 1,1,1,3,5,5,7,7,7-nonamethyl-3-(trimethylsiloxy)-; MD2M'(TMS); M(D2)M' (TMS); Branched Tetrasiloxane; TMS-Functionalized Tetrasiloxane
EINECS	Contact for details

Quality Control

Our production of 1,1,1,3,5,5,7,7,7-Nonamethyl-3-(Trimethylsiloxy)Tetrasiloxane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The product is manufactured and tested in facilities that implement rigorous in-process controls. A comprehensive Certificate of Analysis (COA), detailing purity, identity, and key physical parameters, is provided with each shipment to support your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial use to prevent degradation from atmospheric moisture. Keep away from strong acids and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.3900 - 1.3950
Density (25°C)	0.92 - 0.96 g/cm³
Water Content (KF)	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.